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Browser agent v1211

October 6, 2021

Improvements

AjaxRequest events for all XHR/fetch requests

Previously, XHR/fetch requests were captured as AjaxRequest events only when they were part of a route change. With this change, all requests will be captured as events. This feature can be further configured by specifying which requests should not be collected.

Span events are for all XHR/fetch requests

Previously, Span events were generated only for XHR/fetch requests that were part of a route change. With this change, all requests will be captured as Spans.

Update to Cumulative Layout Shift calculation

The CLS calculation has been updated to use session windows in order to align with Google Chrome tooling (Lighthouse, PageSpeed Insights, CrUX). For more information, see the official blog post on web.dev.

Bug Fixes

Prevent duplicate session trace nodes

The agent no longer calls the clearResourceTimings API, which had the potential to affect other scripts from accessing all resources. Instead, it now uses the PerformanceObserver API to collect information about resources.

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